Steam-engine recorder



(No Model.)

G. HOROSBY. STEAM ENGINE REGORDER.

Patented Apr. 11, 1882 Invenor ff Uroay.

Geo

N4 PETERS. mm-umo mr. Wuhinflon. n. c.

UNITED STATES PATENT OFFICE.

GEORGE H. CROSBY, OF SOMERVILLE;MASSACHUSETTS.

STEAM-ENGINE RECORDER.

SPECIFICATION forming part of Letters Patent No. 256,295, dated April 11, 1882. Application filed J anuary 6, 1882. No model.)

To all whom it may concern Be it known that I, GEORGE H.'OEosBY, of Somerville, of the county of Middlesex and State of Massachusetts, have invented a new .and useful Improvement in Steam-Engine In- I do hereby declare the same in the following specification (heaters; and to be described and represented in the accompanying drawand claimed in the in g, which is a side elevation of an indicator provided with my invention, which is defined in the claim hereinafter presented, and has reference to the mechanism for moving the marker rectilinearly, or substantially so.

In the said drawing, A denotes the steam cylinder, and B the piston-rod thereof. The lever for carrying the marker at is shown at E as jointed at its rear end to a long link, F, which at its foot is jointed to a sleeve, G, fitted to encompass and revolve on the upper part ofthe cylinder A. The said marker-lever E is also fulcrumed to another link, 0, which, at or near its lower end is jointed to the piston-rod at its upperend. Athirdlink, D,jointed to the link 0 at or nearits middle, extends therefrom to and is jointed to the upper part ofa standard or post, H, projecting upward from the sleeve G, as shown. The links being duly proportioned, the marker-leveronthepiston-rod,being moved upward, will be so moved as to cause the marker to move rectilinearly, or substantially so, over the face of the sheet of paper that may be supported on and revolved by the rotary drum 1 of the indicator.

The extreme positions of the marker-lever and its operative links are represented in dotted lines.

Iam aware of the indicator as described United States Patent N 0. 167,364, the parallel motion or mechanism of which for moving the marker in a straight line differs materially from the mechanism 1 I hereinbefore described for such purpose, forin my mechanism the marker-lever E is not connected with the stationary post H by a single link pivoted to it and the post, as is the case in the mechanism of said patent, but is connected with the piston-rod head by a link, which in turn is connected with the post H by the shorter link D, the latter, while the link 0 is'being moved by the piston, causing such link O to move laterally. In my mechanism the marker-lever is moved wholly by the combined operation of the two links 0 and I), which, with the post H and lever E, are in one vertical plane, the post and its link D being directly under instead of aside of the lever E in any ofits positions. With my mechanism all necessity of making the piston-rod tubular and extending the link down within it, and the great friction due to such is avoided, as the piston-rod of my mechanism is not tnbular and is below the link (J.

From the above it will be seen that my parallel-motion mechanism, in the arrangement and adaptation of its parts in respect to the post and piston, not only difi ers from that shown in the said patent, but operates (liflerently and with less friction, and can be constructed at much less expense.

- I claim- In combination with the post H and the marker-lever E and its piston-rod and cylinder-sleeve, connectinglinks O and F, arranged as described, the link D as jointed to the post H and to the link 0, and with such post an ranged under the lever E, all being substantially and to operate as set forth.

It is hereby certified that in Letters Patent N 0. 256,295, granted April 11, 1882, to George H. Crosby of Soinerville, Massachusetts, for an improvement in Steam-Engine Recorders, a comma was improperly inserted after the Word cylinder-sleeve, in line 73 of the printed specification attached to and forming a part of said Letters Patent; that the proper corrections have been made in the files and records of the Patent oflice, and are hereby made in said Letters Patent.

Signed, countersigned and sealed this 25th day of April, A. D. 1882;

[SEAL] A. BELL,

Acting Secretary of the Interior. Uonntersigned E. M. MARBLE,

Oommm'as'ioner of Patents.

It is hereby certified that in Letters Patent No. 256,295, granted April 11, 1882, to George H. Crosby of Somerville, Massachusetts, for an improvement in Steam-Engine Recorders, a comma, was improperly inserted after the Word cylinder-sleeve, in line 73 of the printed specification attached to and forming a part of said Letters Patent;

that the proper corrections have been made in the files and records of the Patent ofliee,

and are hereby made in said Letters Patent.

Signed, countersigned and sealed this 25th day of April, A. D. 1882.

i A. BELL,

[SEAL] Acting Secretary of the Interior.

Uount-ersigned E. M. MARBLE,

Omnm'issioner of Patents. 

